1. A piece of secret writing; anything written in cipher, or in such a form or order that a key is required in order to know how to understand and put the letters together.
2. A written code in which the letters of a text of a communication are replaced with others according to a secret system.

cryptogramic

A reference something that has been written in code or cipher.

cryptogrammatic

1. Referring to a symbol with a secret meaning or significance.
2. Descriptive of a message, text, or communication written so as to conceal its meaning with the use of some form of code.

1. A message or writing in code or cipher.
2. A machine for writing or deciphering encoded messages.

cryptographal

cryptographer

Someone who specializes in the science or study of secret writing.

cryptographic

1. A reference to the science or study of secret writing, especially code and cipher systems.
2. Characterized by the procedures and methods of making and using secret languages; such as, codes or ciphers.

1. The science or study of hidden writing; especially, unknown codes and ciphers: The objective of cryptography is to prevent information from falling into the hands of those who would use it against us.
2. The procedures and methods of making and using secret languages: If a new word for cryptography were to be invented today, it would probably be "secret communications."